# arrow

## Primary tabs

Keywords:
arrow, vector, mapping, function, morphism, functor
Type of Math Object:
Definition
Major Section:
Reference
Groups audience:

## Mathematics Subject Classification

### Original Content Altered Completely

The original author of this entry did not intend this entry to be on the common usage of "arrow". Please restore this perfectly legitimate and well-written entry to its original state... and add a reference, as suggested.

If you want to add an entry on "arrow" in its common usage, please create a separate entry for it.

### Re: Original Content Altered Completely

The original author should have foreseen what would happen if he forgot to log in to PlanetMath for a long while. I can't find a reference at the moment and doubt there is one to be found. But if perchance such a reference is found, the original author's entry will be restored under a different canonical name, one that is less prone to irrelevant autolinking.